Question

[Quynh Anh]

Chứng mình rằng stn A chia hết cho 101 với A = 1.2.3...99.100. ( 1+ 1/2 + 1/3 + ....+ 1/99 + 1/100 )

Answer 1

[Miumiu Channel]

A=1•2•3•...•100

(1+1/100)+(1/2+1/99)+(1/3+1/98)+...+(1/50+1/51)

=1•2•3•100

=(101/100+101/2*99+101/3*98+...+101/50*51)

=1•2•3...100

(101/100+101/2*99+101/3*98+...+1/50*51)

Vì 101:101 => A :101

Nhớ k cho mình nha